Acting Secretary of Defense Pat Shanahan said Wednesday that China remained his top defense priority, but that message could ring hollow during his current trip to Asia as Iranian threats loom over American plans to focus on great-power competitors.

In prepared remarks delivered Wednesday at a Hudson Institute event, Lt. Gen. Robert P. Ashley, Jr., the director of the Defense Intelligence Agency, stated that “The United States believes that Russia probably is not adhering to its nuclear testing moratorium in a manner consistent with the ‘zero-yield’ standard” outlined in …

A top U.S. military official has said that U.S. intelligence agencies believe Russia is likely conducting low-yield nuclear testing that may be violation of a major international treaty.